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An equilateral triangle.

Q: Which regular polygon's interior angles are half that of its exterior angles?

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Interior Angles: n-2 (n is number of sides) ____ 180 Exterior angles are always 360 degrees.

no ,is different .

180 degrees

Because their interior and exterior angles are the same measurements.

All sides are equal in lengthsEach interior angles are equal in sizeAll exterior angles add up to 360 degrees

There is no such thing as an exterior polygon. "Exterior" means outer. Polygons can have exterior angles, but that is about it!A regular polygon can have 3 or more sides - up to infinitely many.There is no such thing as an exterior polygon. "Exterior" means outer. Polygons can have exterior angles, but that is about it!A regular polygon can have 3 or more sides - up to infinitely many.There is no such thing as an exterior polygon. "Exterior" means outer. Polygons can have exterior angles, but that is about it!A regular polygon can have 3 or more sides - up to infinitely many.There is no such thing as an exterior polygon. "Exterior" means outer. Polygons can have exterior angles, but that is about it!A regular polygon can have 3 or more sides - up to infinitely many.

360 degree

Providing that it's a regular polygon then its interior angles will add up to 1260 degrees with each of its 9 interior angles measuring 140 degrees.

all regular polygons (such as a pentagon) have the sum of their exterior angles = 360 degrees

An interior angle and the corresponding exterior angle add up to a straight angle. that is, they are supplementary.

octagon interior=135 exterior=45

Regular polygons are those polygons that are bothequilateral (all sides congruent) and equilateral (all interior angles congruent).